See also https://github.com/h2o/h2o/pull/227 && https://mta.openssl.org/pipermail/openssl-dev/2016-August/008340.html

OpenSSL renamed the library filenames on Windows in OpenSSL 1.1.0 (to libcrypto and libssl, rather then libeay32.lib & ssleay32.lib).

The CMake FindOpenSSL does not seem to have been updated, so now the search passes, but linking fails, since we are attempting to link non-existing libs.